Preheat your air fryer to 375°F (190°C) for about 5 minutes.
Prepare the Brussels sprouts: Trim the ends of the Brussels sprouts and cut them in half lengthwise. Remove any outer leaves that are damaged or loose.
Season the Brussels sprouts: In a large bowl, toss the halved Brussels sprouts with olive oil, minced garlic, salt, and pepper until evenly coated.
Air fry: Place the seasoned Brussels sprouts in the air fryer basket in a single layer, making sure they are not overcrowded. Cook for about 12-15 minutes, shaking the basket halfway through cooking, until the Brussels sprouts are crispy and browned on the edges.
Serve: Once done, transfer the air-fried Brussels sprouts to a serving dish. Optionally, sprinkle some grated Parmesan cheese on top for extra flavor, and drizzle with balsamic glaze for a sweet and tangy finish.
Enjoy! Serve your delicious air fryer Brussels sprouts as a side dish or snack, and watch them disappear quickly!